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Proceedings Paper

Derivatives of polyaromatic hydrocarbons as red emitters in organic light-emitting diodes
Author(s): Lisa C. Picciolo; Hideyuki Murata; Zakya H. Kafafi
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Paper Abstract

The present study focuses on the photoluminescence and electroluminescence properties of a new fluorescent red emitter based on a derivative of a polyaromatic hydrocarbon. 6,13-diphenylpentacene has a very narrow emission spectrum giving rise to a saturated red color with excellent chromaticity coordinates (x equals 0.64 and y equals 0.34) in accordance with the Commission Internationale de L'Eclairage (CIE). Efficient organic electroluminescent devices with saturated red emission were developed using a composite of 6,13-diphenylpentacene and Alq3 as the active emissive layer. An electroluminescence quantum efficiency of 1.4% at 100 A/m2, close to the theoretical limit (1.5%) (based on the measured fluorescence quantum yield, (phi) pl equals 30%, of the emitting layer) was measured for an unoptimized device structure that consists of the emissive layer sandwiched between hole and electron transport layers. In addition, the quantum efficiencies of the pentacene-based devices are stable over a wide range of current densities (1 to 1000 A/m2).

Paper Details

Date Published: 2 February 2001
PDF: 9 pages
Proc. SPIE 4105, Organic Light-Emitting Materials and Devices IV, (2 February 2001); doi: 10.1117/12.416929
Show Author Affiliations
Lisa C. Picciolo, Naval Research Lab. (United States)
Hideyuki Murata, Naval Research Lab. (United States)
Zakya H. Kafafi, Naval Research Lab. (United States)


Published in SPIE Proceedings Vol. 4105:
Organic Light-Emitting Materials and Devices IV
Zakya H. Kafafi, Editor(s)

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